#fertility-tracking

#fertility-tracking

Natural Cycles, the company behind a controversial FDA-cleared birth control app, is replacing its thermometer with a wristband that measures skin temperature, heart rate, and movement during sleep. The newly-launched wristband costs $129.99 and syncs with the Natural Cycles app, which uses an algorithm to determine a person's "daily fertility status." Users can already track their fertility by pairing an Apple Watch or Oura Ring with Natural Cycles, but the wristband could be an option for users who don't have either of these devices handy.

The pitch is to make highly accurate, readily available hormone testing for at-home users. The Ultra4 is technically two separate products. The first is the actual Hormone Monitor, which is a standalone, egg-shaped gadget that analyzes test results. The second is the Ultra4 Wand, which is a little stick you pee on that contains the actual test for four reproductive hormones: follicle stimulating hormone (FSH), luteinizing hormone (LH), estrone-3-glucuronide (E3G), and pregnanediol 3-glucuronide (PdG).